Abaixo está uma instrução que descreve uma tarefa de geração de SQL, combinada com uma entrada que fornece mais contexto sobre os esquemas de tabela disponíveis. Escreva o código SQL que responda adequadamente à solicitação
 ###Instrução: Qual é a diferença de pontos jogados?
 ###Tabelas: CREATE TABLE participating_schools (participating_schools_id AUTO_INCREMENT PRIMARY KEY, School VARCHAR, Location VARCHAR, Enrolment INT, Founded INT, Denomination VARCHAR, Day/Boarding VARCHAR, School Colours VARCHAR, Abbreviation VARCHAR, In competition since INT) CREATE TABLE february (february_id AUTO_INCREMENT PRIMARY KEY, Date VARCHAR, H/A/N VARCHAR, Opponent VARCHAR, Score VARCHAR, Record VARCHAR) CREATE TABLE race_calendar_and_winners (race_calendar_and_winners_id AUTO_INCREMENT PRIMARY KEY, Round INT, Circuit VARCHAR, Date VARCHAR, Fastest lap VARCHAR, Winning driver VARCHAR, Winning team VARCHAR, Winning manufacturer VARCHAR) CREATE TABLE may (may_id AUTO_INCREMENT PRIMARY KEY, Week of VARCHAR, Tier VARCHAR, Winner VARCHAR, Runner-up VARCHAR, Semi finalists VARCHAR) CREATE TABLE league_table (league_table_id AUTO_INCREMENT PRIMARY KEY, Club VARCHAR, Played VARCHAR, Drawn VARCHAR, Lost VARCHAR, Points for VARCHAR, Points against VARCHAR, Points difference VARCHAR, Bonus Points VARCHAR, Points VARCHAR)  
SELECT Played FROM league_table WHERE Points difference = points difference